20544444231 has 8 divisors (see below), whose sum is σ = 27394007424. Its totient is φ = 13695588600.

The previous prime is 20544444229. The next prime is 20544444251. The reversal of 20544444231 is 13244444502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20544444231 - 2¹ = 20544444229 is a prime.

It is a super-2 number, since 2×20544444231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20544444192 and 20544444201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544444251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104961 + ... + 228266.

It is an arithmetic number, because the mean of its divisors is an integer number (3424250928).

Almost surely, 2^20544444231 is an apocalyptic number.

20544444231 is a deficient number, since it is larger than the sum of its proper divisors (6849563193).

20544444231 is a wasteful number, since it uses less digits than its factorization.

20544444231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353781.

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 20544444231 its reverse (13244444502), we get a palindrome (33788888733).

The spelling of 20544444231 in words is "twenty billion, five hundred forty-four million, four hundred forty-four thousand, two hundred thirty-one".